Trail Running calendar near New Castle 2026-2027

A mountain trail event in Steamboat Springs offering 50k, 16 mile and 5 mile courses with high-elevation climbs, cupless aid stations, and limited crewing at Rainbow Saddle. Proceeds support trail maintenance.

A point to point ultramarathon from Crested Butte to Aspen covering about 40 miles and over 6,000 feet of climb, held as a fundraiser for Crested Butte Nordic with mandatory safety gear and on course aid stations.

Trail races at the 10,000 foot summit of Rabbit Ears Pass on September 6, 2026, with a roughly 6.8 mile 10k and a 3.4 mile 5k. Proceeds support Steamboat Nordic and awards and a raffle follow the finish.

A trail race on Meadow Mountain in Minturn, Colorado offering an 11K and a 5K route across singletrack and meadows with stream crossings, scenic mountain views, on-course aid stations, and finish-line t-shirts and refreshments.

Low-key trail running event in Loma, Colorado offering Half Marathon, Marathon (26.2 Miles) and 50 Miler with a flat $50 entry fee. Registration runs April 5 to August 1, and participants may change distance on race day.

Mountain races in Marble, Colorado on September 13, 2026 offering a 25K loop, an 8 mile quarry climb, and a kids 2.5K. Entries include a BBQ lunch, event shirt, finisher medal, and proceeds support Marble Charter School.

Run Rabbit Run in Steamboat Springs, Colorado is an annual trail ultramarathon offering 100 mile (Hares and Tortoises) and 50 mile divisions, limited-field races with a six-figure prize purse and a history of charitable giving.

Mountain trail ultramarathons in Crested Butte, Colorado on September 26, 2026 offer 35K, 55K and 50 Mile courses across alpine meadows and ridges. Aid stations are cupless and the event starts and finishes at Crested Butte Community School..

A scenic half marathon presented by ACG that runs from Fanny Hill in Snowmass along the Government Trail through Aspen groves to Koch Lumber Park, held each late September with registration opening in April.

A point to point trail race from Vail to Minturn with 26K and 14K courses across Vail Mountain. Both routes feature alpine singletrack, scenic views of Mt. Holy Cross, staffed aid stations and a post race lunch voucher.

Trail races of 50K, 28K, and 15K through Hartman Rocks near Gunnison Colorado featuring slickrock, singletrack and wide mountain views. The event includes participant swag and partnerships supporting youth and womxn trail running.

A point-to-point trail marathon and 30K in Colorado’s North Fork Valley that climbs to Inter-Ocean Pass and finishes in Paonia; proceeds fund Nature Connection summer camp scholarships.

An inaugural backyard ultra in Loma, Colorado on October 3, 2026, run as hourly 4.17-mile loops until one runner remains. Distance-specific buckles, finishers swag, and staged crew areas are provided.

Trail races on Emerald Mountain near Howelsen Hill offering a 12k about 7.75 miles and a 4 mile option over aspen-lined singletrack. Awards and series prizes are presented at Olympian Hall after the race.

Two trail race options starting and finishing at Camp 4 Coffee in Crested Butte South, on marked single track and dirt roads through the Gunnison National Forest; the event is fully self-supported.

A Halloween themed 3.1 mile trail run in Aspen with dogs welcome, timed results and cash prizes for top male and female finishers. The event features costume prizes, raffle items and food trucks, with proceeds benefiting the local animal sh..

A multi-distance trail ultramarathon in the North Fruita Desert near Fruita, Colorado, featuring fast singletrack and sections on the Zippity Do Da Trail. Courses range from 10 miles to 50 miles with detailed elevation profiles and cupless..

A three day trail running festival in Fruita, Colorado with four race distances on desert singletrack and mesa trails. The 100K offers a Western States qualifier while several distances earn UTMB Index and Running Stones.